This book entitled Concrete Technology is an attempt to provide a textbook for Civil Engineering technicians, who are taking up a course in the polytechnics or who are engaged in supervising quality control in concrete construction. The subject matter is organized for the specific needs of technicians. The book has some specific and unique features. First, it is a pioneering attempt to provide a textbook for diploma course using scientific methods of subject matter analysis. Secondly, the text can be used as self-instructional material by the students if they are interested to orient themselves for self-study. This is achieved by including section like "Idea Direction", "Vocabulary Development, "Instructional Objectives" and "Work Book". The book extensively follows the specifications and practices contained in the relevant Indian Standards. The book should also be of help to practicing engineers of PWD. MES and construction enterprises in the private and public sectors. This book is a part of a package of instruction in Concrete Technology to be used along with the Laboratory Manual and Handbook.